#include <stdio.h>
int main(){
	int a=1,b=2;
	switch(a+b){
		case 2:
			printf("%d\n",a);
		case 3:
			printf("%d\n",b);
		case 4:
			printf("%d\n",a+b);
		default:
			printf("sad story\n");
	}
	return 0;
}
